Calculating Kinetic Energy of Particle B Using Electrical Potential

AI Thread Summary
To calculate the kinetic energy of particle B when particles A and B are 2.4939 m apart, one must consider the initial conditions where both particles start from rest, resulting in zero initial kinetic energy. The change in electrical potential energy as they move apart can be equated to the kinetic energy gained by particle B, taking into account the conservation of momentum due to their differing charges. The charge of particle A is Q (31 uC), while particle B has a charge of 5Q. The setup involves calculating the electrical potential energy at both distances and using it to find the kinetic energy of particle B. Ultimately, the relationship between potential energy and kinetic energy is key to solving the problem.
srhly
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Particles A (of mass m and charge Q) and B (of mass m and charge 5 Q) are released from rest with the distance between them equal to 0.4939 m. If Q= 31 uC, what is the kinetic energy of particle B at the instant when the particles are 2.4939 m apart? Answer in units of J.

I know that the initial kinetic energy is zero since the particles start from rest. I also know that you can relate the change in electrical potential to kinetic energy. I'm a little confused on how to set it up though.
 
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I think the piece of information you're missing is that momentum is conserved in the process.
 
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